SWIFT 3.35m semiscale
This project for Swift modified that I started in 2012,
using airfoils of AB330 series of acro-
thought so for a aerobatics even at low speeds .
( The details of this model will be specified later on this site)
He initially suffered from various and repeated
flutter problems at the flaps and directional
there to consider that up to 250 km/h about
problems flutter there are none for a regular construction ,
but when you go over you must be very close to perfect,
in particular in balancing and especially in slack/loose
moving parts (linkage, brackets, servos, etc ).
The excellent gps logger SM-
(3D and 10hz , the same used in the Fox)
that records data on micro -
has logged several times much greater speed of 300 km/h
all obtained with the launch altitude of less than 1500m .
In particular these are some interesting speeds in speed tests
recorded, and ' confirmed', more than 300 km/h, in 2014
in different sessions of the flight:
The fact of being able to see and measure ( altitude, time, distances, etc )
the entire path made by the model in Google Earth ,
including 4 or more flight hours, lets see if the data peak
and trusted ( from the point of view of a data obtained from GPS ) or less .
The gps can in fact at times, usually for a few seconds ,
disconnect the signal and sometimes even on the radio incorrect data ,
the radio logs and often keeps in memory only the maximum data
immediately viewable on display
(although on my FX32 , are also recorded on sd-
which are therefore incorrect.
For this reason, the analysis of the log of the gps on pc
is indispensable in Google Earth to confirm whether or not the speed .
For example, a detected speed, viewable in the log,
but not confirmed because shortly after the GPS loses signal,
is 392 km/h and 395 km/h ,
instead on a pair of occasions, are recorded speed ever NOT confirmed,
because marked as maximum from Radio, but NOT detectable,
in the radio log and gps log, are to 461km/h in one case
and 510km/h in another (see photo below).
Other strange data that there is no trace
in these first ~65 hours of flight from this May I have not seen .
Therefore, the confirmation of the speed views of the radio can be done
only after an analysis of the PC .
I would add that the transmissions from GPS systems on the model to the radio,
they suffer the sampling times due and regulated by the radio,
so evaluating and seeking the maximum values ,
it is the best system for recording log
directly from GPS on the model just as it is able to do this gps of SM.
Sure to have this and that is an advantage.
Also note that all GPS records the relative velocity so there is always a difference
if the speed tests take place against the wind or tailwind.